---
title: "List an address's ERC-20 balances"
method: GET
path: "/{chain}/addresses/{address}/balances"
tags: ["Addresses"]
---

# List an address's ERC-20 balances

`GET /{chain}/addresses/{address}/balances`

## Request

- Base URL: `https://api.blockvectra.com/v1/data`
- URL: `https://api.blockvectra.com/v1/data/{chain}/addresses/{address}/balances`
- Auth: API key in header `x-api-key`

Keyset-paginated list of non-zero ERC-20 balances for an address, ordered by `token` address ascending. Token metadata (`symbol`, `decimals`) is included where available. An address with no balances returns `200` with `data: []`.
**Snapshot freshness**: balances come from a materialized snapshot that the data store refreshes every 6 hours (with up to 30 minutes of random delay), so the newest rows can be about 6.5 hours old plus the refresh run itself. `as_of_block` here is the service's current indexed head, not the block height of the snapshot; read the snapshot time from `meta.refreshed_at`, and treat the data as stale when `refreshed_at` is `null`.

## Path parameters

- `chain` string, required
- `address` string, required: 20-byte address. `0x`/`0X` prefix optional; either hex digit case is accepted.

## Query parameters

- `limit` integer
- `cursor` string

## Response `200`

This address's non-zero ERC-20 balances, `token` ascending.

- AddressBalanceListEnvelope
  - `data` AddressBalance[], required
    - `token` string, required: 20-byte address, canonical form always `0x` + 40 lowercase hex digits.
    - `balance` string, required: Non-negative integer that may exceed 2^53, rendered as a plain decimal string — never a JSON number, never scientific or hex notation.
    - `symbol` string, nullable, required
    - `decimals` integer, nullable, required
  - `next_cursor` string: Opaque pagination token from the previous response's `next_cursor`; pass it back unchanged.
  - `meta` Meta, required: Metadata present on every success response.
    - `chain` string, required: Chain identifier; the value of the `{chain}` path parameter.
    - `chain_slug` string, required: Canonical uppercase chain slug; `chain` is always its lowercase form.
    - `chain_external_id` string, required: CAIP-2 formatted external chain identifier (`eip155:{chain_id}`).
    - `as_of_block` integer, required: The newest fully written block (the `blocks` table's maximum height); the only serving bound for block-scoped endpoints. For snapshot endpoints (balances, holders, nfts, dex prices, stocks) it is the service's current indexed head, not the block height of the snapshot: read the snapshot time from `meta.refreshed_at`, and treat the data as stale when `refreshed_at` is `null`.
    - `safe_block` integer, nullable, required: A marker only: the node's consensus `safe` block. Always present; `null` while no value is known (the node has no such tag, or the indexer has not read one yet). Only grows, never below `finalized_block`, and may be above or below `as_of_block`. It never truncates, rejects or bounds a response; see Finality in the API description.
    - `finalized_block` integer, nullable, required: A marker only: the node's consensus `finalized` block. Always present; `null` while no value is known (the node has no such tag, or the indexer has not read one yet). Only grows, and may be above or below `as_of_block`. It never truncates, rejects or bounds a response; see Finality in the API description.
    - `coverage` 'full' | 'partial', required: `"partial"` appears only from `GET /{chain}/addresses/{address}/transactions` and `GET /{chain}/addresses/{address}/transfers`, when `clamp=true` narrowed the served window, and from those two, `GET /{chain}/tokens/{token}/transfers` and `GET /{chain}/dex/swaps` when the block window starts before the lower bound of the dataset the endpoint reads -- the chain's first indexed block, or higher while that dataset is still being backfilled (see Coverage in the API description and each endpoint's window description). Every other endpoint reports `"full"`.
    - `refreshed_at` string, date-time, required: `YYYY-MM-DDTHH:MM:SSZ`, UTC, second precision.

## Other responses

- `400`: `error.code = "bad_request"`: invalid `{address}`; invalid `limit`; or an invalid `cursor`.
- `401`: HTTP 401: a missing API key returns missing_api_key; an unknown, disabled, or revoked key returns the same invalid_api_key error envelope. error.code and error.data.reason contain the reason. Rejected requests are not billed.
- `402`: Payment required: the paid balance or the free grant is exhausted. The response body is `{"error":{"code":"insufficient_balance"}}`. Rejected requests are not billed.
- `404`: `error.code = "not_found"`: the target object was not found, or `{chain}` is not a registered or public chain (returns HTTP 404 with `error.code = "not_found"`, not billed).
- `409`: After the operation passes its earlier routing, capability, parameter and permit checks and reaches the indexed-head check, `error.code = "not_indexed_yet"` without `indexed_through`: the chain has no indexed block at all yet (`GET /chains` `coverage.has_data = false`), so there is no head to answer against (see "Errors" above). Transient: retry later. A missing capability (including `traces`) is checked before the empty head and returns `422 no_coverage` instead.
- `422`: `error.code = "no_coverage"`: no data here, which is permanent except while a dataset is being backfilled (a windowed endpoint's lower bound can move down as the backfill proceeds, so retry later). Either the chain does not have this endpoint's capability, or the requested block (or whole block window) is before the chain's first covered block (`coverage.from_block`) -- for the windowed endpoints, the lower bound of the dataset they read, which is that block or higher while the dataset is still being backfilled -- or the capability needs history from genesis (`balances`, `holders`, `nfts`) and `coverage.from_block` is not `0` yet or the indexed blocks have holes, or (traces) the block falls in a permanent trace coverage gap. A block window entirely before the lower bound is reported as this `422` even when its `to_block` is also above `as_of_block`. See Coverage in the API description (the history start in examples is a placeholder; read `GET /chains` `coverage.from_block` at runtime).
- `429`: Rate limited. `{"error":{"code":"rate_limited"}}` when the key CU rate limit is exceeded (the response includes `Retry-After`) or the account call rate limit is exceeded (no `Retry-After`). `{"error":{"code":"cost_exceeds_burst"}}` when a single request exceeds the key burst capacity; split the request, retrying as sent never succeeds. Rejected requests are not billed.
- `503`: Reader `error.code = "unavailable"` keeps the `Unavailable` response contract. The gateway can instead reject before the reader answers with `error.code = "gateway_overloaded"`, `error.data.reason = null`, `retryable = true`, and `Retry-After: 1`; this rejection is not billed. Reduce concurrent requests across the account's keys and chains and wait `Retry-After` before retrying. This does not prove reader coverage or successful balances retrieval; `422 no_coverage` is unchanged.

---

[API](https://skmtc.dev/blockvectra/apis/blockvectra-data-api.md) · [All operations](https://skmtc.dev/blockvectra/apis/blockvectra-data-api/llms.txt) · [OpenAPI document](https://skmtc.dev/blockvectra/apis/blockvectra-data-api/revisions/c5b949e955b5?raw)